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3M™ Hot Melt Adhesive 3779, Amber, 100% Solids Thermoplastic Adhesive

Brand: 3M™
Product Number: 3779
Technologies: Hot Melt Adhesive
Color: Amber
Cure Type: Thermoplastic (Hot Melt)
Package Sizes:

  • 5/8 in x 8 in (Q)
  • 5/8 in x 2 in (TC)
  • 1 in x 3 in (PG)
  • 1/8 in Bulk

Shelf Life: 24 months

Product Description

3M™ Hot Melt Adhesive 3779 is a high-strength thermoplastic adhesive that bonds to a wide variety of substrates, including wood, plastic, vinyl, metal, and glass. It provides excellent environmental stability, very high heat resistance, and fast set time, making it ideal for demanding industrial applications. The adhesive is designed to set quickly and provide high-performance bonds.


Key Features

  • 100% Solids Composition: No VOCs, environmentally friendly.
  • High Strength Bonding: Excellent adhesion to wood, metal, plastics, and glass.
  • Very High Heat Resistance: Supports up to 149°C (300°F).
  • Fast Set Time: Quickly gains bond strength, eliminating the need for clamping.
  • Long Open Time: Allows for large surface bonding and assembly flexibility.

Recommended Applications

  • Woodworking and Furniture Assembly
  • Plastic and Vinyl Bonding
  • Metal and Glass Bonding
  • General Industrial Bonding & Sealing

Technical Data

Typical Physical Properties

Attribute Name Test Method Temperature Value
Color Amber
Density 0.99 g/cm³ (0.036 lb/in³)
Open Time OSB 25 s¹
Flash Point ASTM D92-72 288°C (550°F)²
Delivery Time 75 s³
Viscosity Brookfield Thermocel Viscometer (#27 Spindle @ 10 RPM) 191°C (375°F) 7,000 cP⁴

¹ Open time is based on a 3.2 mm (1/8 in) semicircular bead on non-metallic substrates at 24°C (75°F).
² Measured using the Cleveland Open Cup method.
³ Extrusion time for one 25 x 76 mm (1 x 3 in) PG cartridge.
⁴ Measured using a Brookfield viscometer.


Typical Performance Characteristics

Attribute Name Test Method Temperature Substrate Value
180° Peel Adhesion 23°C (73°F) Flexible Canvas to Douglas Fir 32 N/cm (288 oz/in)
Overlap Shear Strength 23°C (73°F) Douglas Fir 49 kg/cm² (700 lb/in²)
Ball & Ring Melt Point ASTM E28-67 163°C (325°F)
Application Temperature 177 – 196°C (350 – 385°F)¹
Temperature Resistance 149°C (300°F)²

¹ Recommended application temperature range to regulate viscosity, delivery rate, and pot life.
² Maximum temperature at which the adhesive supports a 14 kPa (2 psi) dead load.

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